Experiments using the vacuum thermal evaporation methods, under the monitoring of highly accurate film thickness controller, prepared the ITO/2T-NATA(25 nm)/NPB(30 nm)/BePP2(X nm)/Alq3(30 nm)/LiF(0.6 nm)/Al(80 nm)blue organic light-emitting diode structure, analyzed and experimental researched the organic light emitting layer of BePP2 deposition rate and thickness of the organic light emitting diode luminance and luminous efficiency. Experiments show that:When beam source furnace aperture is Φ1.5 mm, beam source furnace temperature is 120℃~150℃, BePP2 evaporation rate is smooth, the slope change is small, easy to film thickness precision control, and the film are denser to meet the needs of the device; when light-emitting layer BePP2 best deposition rate is 0.02 nm/s (evaporation temperature is 135 ℃) , and the thickness of BePP2 is 35 nm, get lights on voltage of 5.34 V, luminescence brightness of 9 100 cd/m2, 4.4 cd/A luminous efficiency of the ideal blue device can be obtained.